K5 software correlator user manual
Contents
1. 2 At corr directory execute cor apeXY 10 txt or fx_cor apeXY 10 txt 3 Compare your results with cor_10 gif or fx_cor_10 gif 4 Preparation for data correlation In this manual one base band channel BBC corresponds to a base band filter supplying one of IF channels on of left or right circular polarization Each of BBCs is specified in each of lines in the section FREQ in VEX and FRUDGE files In the correlation process you need not only Mark 5 and or K 5 formatted data but also a schedule file that has either VEX or DRUDGE format It is convenient to put them in the same directory you created As shown in Sect 1 6 you can set several environment variables to set several short cuts to e g your data directory 5 Data conversion from Mark 5 to K 5 format 5 1 Series of conversion modules The module m5tok5 is used 5 1 1 m5check Sync pattern check in a Mark 5 formatted file Usage m5check m5file mode where m5file Mark 5 data file name to cheak mode data mode 0 with parity 8116132164 bit word mode 1 non parity 8116132164 bit word mode 2 use old display style if mode is omitted both modes are checked automatically example root localhost mark5 m5check home cvnhd data radio SH507901 1000000 dat KKK K K KK K K K K K K K K K K KK K K K K K K K K K K KK K K K K fe K K K K K K K K K K K K K K K K K K K K 2 K K k Mark 5 data structure analysis E s Ver 1 35 2005 06 17 by T KONDO NICT2. deflt 4 adbit adbit of AD conversion bit deflt 1 nch numch of channels in K5 format 1 or 4 deflt 4 parity with parity data noparity non parity data deflt vlba set VLBA mode default mark IV mode s strat_sec offset time from data head sec default 0 p period data period to convert sec default all odd 32bit 4byte shift in reading MarkS data this works only for 64 track mode The rule of given filenames for K 5 formatted file For example an original Mark 5 formatted file named MK5 leads to make the following filenames according to the selected BBC and group number in 4 ch mode MKS kSa group 1 in info_file MKS kSb group 2 in info_file MKS kSc group 3 in info_file MKS kSd group 4 in info_file in 1 ch mode MKS k5 NN NN corresponds to one BBC ch 1 16 Example An EVN data with 8 BBCs group 1 consists of BBC1 2 3 4 while group 2 consists of BBCS 6 7 8 example 1 making an info_file file root localhost mark5 m5tok5 home cvnhd data radio SH507901 1000000 dat i make MStokS running under Information File create mode info file mStok5info txt will be created updated Enter VEX file name gt t5320 skd VEX file name t5320 skd SITES Station ID defined are SITES Station ID defined are ID SITENAME Sh SHANGHAI Ur URUMQI Km KUNMIN Select Station by ID gt 1 ID 1 is not included in the table I
3. bitpos 20 1 12 bitpos 21 1 14 bitpos 22 1 16 bitpos 23 1 18 bitpos 24 1 20 bitpos 25 1 22 bitpos 26 1 24 bitpos 27 1 26 bitpos 28 1 28 bitpos 29 1 30 bitpos 30 1 32 bitpos 31 1 02 GROUP group versus channel table KKK K K K K K K K K KK K K K K K K K K K K KK K K K K K K K K K K KK K K K K K K K K K ok KE Please edit this table as you like pii KKK K K K K K K K K KK K K K K K K K K K K KK K K K K K K K K K K KK K K K K K K K K K ok xK KF g gt group E ch1 gt Ist channel in this group xE ch2 gt 2nd channel in this group EE ch3 gt 3rd channel in this group E ch4 gt 4th channel in this group group g ch1 ch2 ch3 ch4 group 1 1 2 3 4 group 2 5 6 7 8 group 3 9 10 11 12 group 4 13 14 15 16 example2 conversion of all groups with 4 ch mode using the info_file file created in example 1 The converted file is created in the directory in which the Mark 5 formatted file exists m5tok5 home cvnhd data radio SH507901 1000000 dat 5 2 Step by step recipe of data conversion An input Mark 5 formatted files are assigned here as MK5 a Checking the status of your Mark 5 formatted file Run mScheck and find out whether the data in the file have parity bits If sync is found in the processing m5check MKS the data have parity bits If sync is found in the processing m5check MKS 1 the data do not have pari
4. tar xvof or tar xvzf pgplot5 2 tar gz 1 2 3 Create the target directory mkdir usr local pgplot 1 2 4 Select device drivers cd usr local pgplot cp usr local src pgplot drivers list Configure PGPLOT by selecting device drivers from the available list Edit the drivers list file vi drivers list Choose the device drivers LATEX NULL PS VPS CPS VCPS TEK4010 RETRO GF GTERM XTERM TK4100 VT125 XWINDOW XSERVE 1 2 5 Create the makefile cd usr local pgplot In the FreeBSD usr local src pgplot makemake usr local src pgplot freebsd In the linux usr local src pgplot makemake usr local src pgplot linux g77_gcc 1 2 6 Use make to compile the code make Optionally install and test the C binding for PGPLOT This requires an ANSI C compiler that understands function prototypes and is not available on all systems make cpg make clean You will then have the following files in the current directory cpgdemo grexec f libcpgplota pgdemol pgxwin_server cpgplot h grfont dat libpgplot a pgplot doc rgb txt drivers list grpckg 1 inc makefile pgplot inc In the linux environment there is libpgplot so 1 2 7 Copy the including file library cp libcpgplot a_ usr lib cp libpgplot a usr lib cp cpgplot h usr include In the linux environment cp libpgplot so usr lib 1 2 8 Run the demonstration programs Run the demonstration programs on your selected devices and verify that they run satisfactorily Before running
5. Y DDD HH MM SS SSS 5 079 01 10 00 000 Bit position and track table bit pos 00 01 02 03 04 05 06 07 08 09 10 11 12 13 1415 Validity 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Track 5 7 9111315 17 19 21 23 25 27 293133 3 HDstack 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 bitpos 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Validity 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Track 4 6 810121416 18 20 22 24 26 28 3032 2 HDstack 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 KKK K K K K K K K K KK K K K K K K K K K K KK K K K K K K K K K K KK K K K K K K K K K K KK K K K K K K K K K K KK K K ok 5 1 2 Data conversion in m5tok5 usage style 1 m5tok5 mk5_filename options where mk5_filename Mark 5 data file name options any order c channel pickup channel 1 16 for 1ch conversion mode default all group and 4ch mode g group pickup group 1 4 for 4 ch conversion mode omitted when c option is set default all group iinfo_file infomation file name that contains track vs channel table bit_psition vs channel table group vs channel table default mS5tokSinfo txt i info_file means create infomation file named info_file i make means create default info file o k5name K5 file name to be created default see below d k5dir directory for k5 file out default mark5 directory s strat_sec offset time from data head sec default 0 p period data period to convert sec default all r reverse track order when fa
6. crate tl pp smode pp_mode delsize tzoom pmode comment loop_p where afile A priori file name if O is given internal dflt name will be used sekibun Total integration period float seconds VE for all data processed if possible 0 for scheduled obs period default soffset Start time offset int sec default 0 coffset Clock offset sec dfault 0 0 crate Clock rate offset s s dfault 0 0 tlpp PP period sec default 1 0 smode _ Search mode 0 Wide 1 Mid 2 Narrow default 2 pp_mode PP synchronization mode 0 synchronized to second tic default 1 not synchronized to second tic delsize Lag window size 16 32 64 128 256 512 0 measn delsize set to DELAYSIZE default tzoom Time axis zoom ratio int O full scale default as same as 1 VE Max position is automatically centered pmode Plot device selection 0 XTERM env PGDISP can change PGPLOT display device and PostScript file pgplot ps out default 1 PostScript file pgplot ps out only 2 XTERM only 1 No graphic output comment Comment appeared on a graph loop_p Loop parameter 0 no loop default 1 Infinite loop for real time use fx_corenv _ for getting environment variable info Note EVN clock search should set this option to make the processing faster The output file named cout0000 txt is created in the directory cout which includes the fringe search results Note
7. module To change the output device type as follows before executing sdelay setenv PGDISP xterm using XTERM setenv PGDISP ps creating PostScript file setenv PGDISP xw using XWINDOW Note A displayed correlation coefficient is not corrected for e g Van Vleck correction 6 5 Search residual delay and delay rate The estimated residual delay and rate are displayed in the output of the module sdelay A positive value in the delay means that the Y station clock is delayed with respected to the X station Left right and front behind axes in the horizon of the 3 D diagram indicate the delay and delay rate axes respectively Note If a fringe is located very close to the window edge a false delay and rate solution might be obtained In this case recorrelation is recommended to put the fringe away from the window edge To do so increase in a lag number or shift a delay and a rate by setting a priori delay and rate residuals in the a priori parameter calculation or in data correlation
8. 000000 dat Now analizing the data BIT not this mode not this mode OK this mode Checking 8 track mode Checking 16 track mode Checking 32 track mode TIME FIELD CRC HEADER AUX 00 11223344 05400064 FRFFFFFFF 50790110 00000763 01 11223344 07800064 FFFFFFFF 50790110 00000810 02 11223344 09C00064 FFFFFFFF 50790110 00000C39 03 11223344 11010064 FRFFFFFFF 50790110 00000B77 04 11223344 13410064 FFFFFFFF 50790110 00000E18 05 11223344 15810064 FFFFFFFF 50790110 000001A9 06 11223344 17C10064 FFFFFFFF 50790110 000004C6 07 11223344 19020064 FFFFFFFF 50790110 00000D8C 08 11223344 21420064 FFFFFFFF 50790110 00000C1E 09 11223344 23820064 FFFFFFFF 50790110 0000036D 10 11223344 25C20064 FFFFFFFF 50790110 000006C0 11 11223344 27030064 FRFFFFFFF 50790110 00000363 12 11223344 29430064 FFFFFFFF 50790110 0000074A 13 11223344 31830064 FRFFFFFFF 50790110 00000AD4 14 11223344 33C30064 FFFFFFFF 50790110 OOOOOFBB 15 11223344 03000064 FFFFFFFF 50790110 000002CE 16 11223344 04480064 FFFFFFFF 50790110 00000DF6 17 11223344 06880064 FRFFFFFFF 50790110 00000285 18 11223344 08C80064 FFFFFFFF 50790110 000006AC 19 11223344 10090064 FFFFFFFF 50790110 000001E2 20 11223344 12490064 FFFFFFFF 50790110 0000048D 21 11223344 14890064 FFFFFFFF 50790110 00000B3C 22 11223344 16C90064 FFFFFFFF 50790110 00000E53 23 11223344 180A0064 FFFFFFFF 50790110 00000719 24 11223344 204A0064 FFFFFFFF 50790110 0000068B 25 11223344 228A0064 FFFFFFFF 50790110 000009F8 26 11223344 24C
9. 507901 1000000 dat tation SHANGHAI Sh mode for scan 1 lunar CHANNEL channel track info block adbit 1 A D resolution sample 16000000 000000 Sampling frequency fanout 4 Fanout default pass A xK EE nn gt channel KE h ss gt h head stack ss sign bit track EE h mm gt h head stack mm magnitude bit track ch nn h ss h ss h ss h ss ch 01 1 02 1 04 1 06 1 08 ch 02 1 10 1 12 1 14 1 16 ch 03 1 18 1 20 1 22 1 24 ch 04 1 26 1 28 1 30 1 32 ch 05 1 03 1 05 1 07 1 09 ch 06 1 11 1 13 1 15 1 17 ch 07 1 19 1 21 1 23 1 25 ch 08 1 27 1 29 1 31 1 33 DATAMODE Mark V data format parity 0 non parity nzm 0 NRZL encoding format Mark IV Mark III or IV format ntrack 32 of tracks bits word BITPOS bit position versus track information ok ok ae bb gt bit position KE h tt gt h head stack tt track bitpos bb h tt bitpos 00 1 05 bitpos 01 1 07 bitpos 02 1 09 bitpos 03 1 11 bitpos 04 1 13 bitpos 05 1 15 bitpos 06 1 17 bitpos 07 1 19 bitpos 08 1 21 bitpos 09 1 23 bitpos 10 1 25 bitpos 11 1 27 bitpos 12 1 29 bitpos 13 1 31 bitpos 14 1 33 bitpos 15 1 03 bitpos 16 1 04 bitpos 17 1 06 bitpos 18 1 08 bitpos 19 1 10
10. A0064 FRFFFFFF 50790110 00000C55 27 11223344 260B0064 FFFFFFFF 50790110 000009F6 28 11223344 284B0064 FFFFFFFF 50790110 OOOOODDF 29 11223344 308B0064 FFFFFFFF 50790110 00000041 30 11223344 32CB0064 FFFFFFFF 50790110 0000052E 31 11223344 02080064 FFFFFFFF 50790110 0000085B Analyzed Mark V data format is as follows data encode NRZL without parity data format Mark III IV 5 079 01 10 00 000 5 079 01 10 00 000 5 079 01 10 00 000 5 079 01 10 00 000 5 079 01 10 00 000 5 079 01 10 00 000 5 079 01 10 00 000 5 079 01 10 00 000 5 079 01 10 00 000 5 079 01 10 00 000 5 079 01 10 00 000 5 079 01 10 00 000 5 079 01 10 00 000 5 079 01 10 00 000 5 079 01 10 00 000 5 079 01 10 00 000 5 079 01 10 00 000 5 079 01 10 00 000 5 079 01 10 00 000 5 079 01 10 00 000 5 079 01 10 00 000 5 079 01 10 00 000 5 079 01 10 00 000 5 079 01 10 00 000 5 079 01 10 00 000 5 079 01 10 00 000 5 079 01 10 00 000 5 079 01 10 00 000 SYNC YDDDHHMM SSsss 12 Y DDD HH MM SS SSS FMHz 4 0 4 0 4 0 4 0 4 0 4 0 5 079 01 10 00 000 4 0 5 079 01 10 00 000 5 079 01 10 00 000 5 079 01 10 00 000 4 0 4 0 4 0 of track 32 Information file m5tokSinfo txt created gt the contents in info_file m5tok5info txt mkStok5 information file created by m5tok5 Ver 2 10 2005 06 17 hh on Fri Nov 25 01 25 24 2005 2 head stack number included in track info analyzed VEX file t5320 skd analyzed Mark S file home cvnhd data radio SH
11. DDNNNNXYG txt corr l fx_cor l fx_cor_all l cor cor_all cout Correlation output l coutNNNN txt fx_cor output file l couttNNNN txt cor output file sdelay sdelay 3 1 How to Check the installation Actual K5 VSSP data are available for the purpose of correlation software check There are two sets of data as follows e 10 seconds data o A priori file apeXY10 txt http www 2 nict go jp ka radioastro IPVLBI apeX Y 10 txt o X station raw data Xk5data 10 dat 39MB http www2 nict go jp ka radioastro IP VLBI XkS data 10 dat o Y station raw data Yk5data 10 dat 39MB http www2 nict go jp ka radioastro IP VLBI YkSdata 10 dat o cor results cor_10 gif http www nict go jp ka radioastro IPVLBI cor_10 gif o fx_cor results fx_cor_10 gif http www nict go jp ka radioastro IPVLBI fx_cor_10 gif e 20 seconds data o A priori file apeXY20 txt o X station raw data Xk5data 20 dat 78MB http www 2 nict go jp ka radioastro IP VLBI XkS5data 20 dat o Y station raw data Yk5data 20 dat 78MB http www2 nict go jp ka radioastro IP VLBI YkSdata 20 dat o cor results cor_20 gif http www nict go jp ka radioastro IPVLBI cor_20 gif o fx_cor results fx_cor_20 gif http www nict go jp ka radioastro IPVLBI fx_cor_20 gif HOW TO CHECK in case of 10 seconds data 1 Download apeX Y10 txt Xk5data 10 dat and Yk5data 10 dat to the corr directory folder
12. FF 50790110 00000AD4 53EE015C F216E315 4 0 14 11223344 33C30064 FFFFFFFF 50790110 OOOOOFBB C2E54A48 2B3A1A0A 4 0 15 11223344 03000064 FFFFFFFF 50790110 000002CE 08021661 F237699F 4 0 16 11223344 04480064 FFFFFFFF 50790110 00000DF6 S5FB52A2C 104534C4 4 0 17 11223344 06880064 FFFFFFFF 50790110 00000285 70161506 DA4AFES55 4 0 18 11223344 08C80064 FFFFFFFF 50790110 000006AC 8B58335A FO66CB6E 4 0 19 11223344 10090064 FFFFFFFF 50790110 O00001E2 63E994F6 AEDFABCE 4 0 20 11223344 12490064 FFFFFFFF 50790110 0000048D FAA582A7 DAFDDC62 4 0 21 11223344 14890064 FFFFFFFF 50790110 00000B3C CAC83EFF 7550FOF3 4 0 22 11223344 16C90064 FFFFFFFF 50790110 00000E53 2A2A9DFO 48C86B84 4 0 23 11223344 180A0064 FFFFFFFF 50790110 00000719 SDA107CD 1D01BD6D 4 0 24 11223344 204A0064 FFFFFFFF 50790110 0000068B 021E61EC 8E1C50F3 4 0 25 11223344 228A0064 FRFFFFFFF 50790110 000009F8 84DF4ADE 9ECBC659 4 0 26 11223344 24CA0064 FFFFFFFF 50790110 00000C55 AE85CE88 4EEEFE54 4 0 27 11223344 260B0064 FFFFFFFF 50790110 000009F6 8DB47BE3 D952D68A 4 0 28 11223344 284B0064 FFFFFFFF 50790110 OOOOODDF 018255F2 A696C587 4 0 29 11223344 308B0064 FFFFFFFF 50790110 00000041 F26511B4 C59A340C 4 0 30 11223344 32CB0064 FFFFFFFF 50790110 0000052E OC96BFE3 4D1DC81C 4 0 31 11223344 02080064 FFFFFFFF 50790110 0000085B BEF413F2 1BD89D32 4 0 File Name home cvnhd data radio SH507901 1000000 dat of tracks 32 DATA mode NRZL_ without parity bits frame 20000 This is Mark IV Format Ist header time
13. In the case of correlation between the different BBC e g for cross hand circular polarization correlation use the following options chl chlY defines Y channel for X ch 1 default 1 0 for delete ch2 ch2Y defines Y channel for X ch 2 default 2 0 for delete ch3 ch3Y defines Y channel for X ch 3 default 3 0 for delete ch4 ch4V defines Y channel for X ch 4 default 4 0 for delete 15 If you want to correlate X ch1 Y ch2 X ch2 Y ch1 set parameters as follows fx_cor afile ch1 2 ch2 1 6 3 Full data correlation a Move to the directory corrapri b Prepare a list of a priori files by typing as follows ls 1 apeDDD XY txt gt apelistDDDXY txt where DDD is the day of the year XY is the baseline code processed Note that c Move to the directory corr d Make backup for the directory cout in the directory where the K 5 format data exist e Create the new cout directory f Run fx_cor_all as follows fx_cor_all file name of the list of a priori files is minus one 6 4 Course search of a residual delay and rate a Move the created directory cout to a new directory entitled coutDDDXX where DDD is the day of the year and XX is the baseline code b Run sdelay The module sdelay asks b 1 a directory ID specified above so input the directory name b 2 data processed so type 0 that means all data b 3 file name of the output cout so choose the file name recommended by the
14. K5 software correlator user manual revised version Revised from the version written by Hiroshi Imai Yasuhiro Koyama and Tetsuro Kondo JIVE version 28 Nov 2005 0 Introduction This document is the user manual describing how to use the K5 Software Correlator package and how to apply it to the fringe detection and clock parameter search in VLBI observations This package has been developed and maintained by the Radio Astronomy Applications Group in Kashima Space Research Center KSRC National Institute of Information and Communications Technology NICT Japan The package consists of parts reading a schedule file that is either SKED DRUDGE or SCHED VEX formatted converting the Mark V data format into the K 5 format making data correlation and displaying fringe search results Although the original user manual is written mainly in Japanese this document is written according to the English version for JIVE Joint Institute for VLBI in Europe and the original Japanese manual for the international usage based on short experiences in using the package at KSRC 1 Installation of the package 1 1 Necessary environment Linux PGPLOT cpgplot h should be valid 1 2 Installation of the PGPLOT package See also http www astro caltech edu tjp pgplot 1 2 1 Download pgplot5 2 tar gz to usr local sre by ftp ftp astro caltech edu pub pgplot pgplots 2 tar gz 1 2 2 Decompress the files cd usr local sre gunzip c pgplot5 2 tar gz
15. any PGPLOT program you must ensure that the environment variable PGPLOT_DIR is correctly defined csh setenv PGPLOT_DIR usr local pgplot sh PGPLOT_DIR usr local pgplot export PGPLOT_DIR export PGPLOT_DIR usr local pgplot To run a program type its name with directory if the current directory is not in your path pgdemol 1 3 Unpacking the software package 1 3 1 Download ipvlbi_cor20051011 tar gz Ver 2005 10 11 to an adequate directory 1 3 2 Decompress an archive file tar xvzf ipvlbi_corxXXXXXXXX tar gz Make a directory for the package move to the directory then extract the package as follows 1 3 3 Change working directory this is not necessary for Ver 2005 06 17 and before cd ipvIbiXXXXXXXX 1 4 Start the installer Execute following shell script to install source install_cor sh or source install_cor_usefftw sh if FFTW package is installed see below On the FreeBSD system following warning message usr lib libg2c so warning tempnam possibly used unsafely consider using mkstemp will appear but this is caused by PGPLOT graphic package So you can ignore this warning message If many warnings appear on the linux system please try source install_cor 64 sh On the FreeBSD system following warning message 1 5 Use of FFTW Packagee Ver 2005 01 13 and later supports the use of FFTW Ver 3 0 1 package in fx_cor and fx_cor_all which improves throughput significantly If FFTW is already intsal
16. apri will be applied as a default baseid baseline_id is baseline ID A2 or A4 coffset clock_offset is the clock offset sec applied for fringe search purpose Positive value menas Y clock tic earlier than X clock tic Default is 0 0 crate clock_rate is the clock rate s s difference between X and Y station clock Default is 0 0 g group Frequency group 1 4 for 4ch mode correspnding to PC deflt 1 ch channel Frequency ch for 1ch mode deflt 1 start start_obs Start obs default is the 1st obs stop stop_obs Stop obs default is the last obs xdir xdir_ X data file directory ydir ydir Y data file directory utl utl_c UT1 UTC sec wobbx wobbx Wobb X arcsec wobby wobby Wobb Y arcsec type1 type2 K5 obs file naming rule typel sidDDDNNNN dat default type2 sidDDDHHMMSSG dat type naming_type K5 obs file naming rule 1 Type 1 sidDDDNNNN dat sked default 1 Type 1 sid DDDNNNN ch dat 2 Type2 sidDDDHHMMSSG dat 2 Type 2 sidDDDHHMMSSG ch dat 3 Type3 expid_sidG_scanid_YYYYDDDDHHMMSS k5 e VLBI compliant 4 Unused 5 Type5 expid_scan stcode k5a d VEX deflt subnet nosubnet Subnet mode control default is subnet on subnet skey satellite_key set satellite key s for NOZOMI mode if keys are more than one use like skey NOZ HYB dflt is auto mode xcoff x_clock_offset X clock offset to UTC sec Usage style 2 apri_calc skdfile aped
17. e year at 1 st scan NNNN scan number 4 digit number XY baseline ID 2 characters ID described in the schedule file G Frequency group ID 6 2 Quick correlation and fringe search Usage style 1 fx_cor afile options where afile A priori file name if O is given internal dflt name will be used and options any order integ integration_time is the integration period sec Default is scheduled scan period coffset clock_offset is the clock offset sec applied for fringe search purpose Positive value menas Y clock tic earlier than X clock tic Default is 0 0 crate clock_rate is the clock rate s s difference between X and Y station clock Default is 0 0 soffset start_offset is the start time offset integer sec Default is 0 tlpp tlpp is the unit integration period parameter period sec for correlation processing Default is 1 0 Note When set lt 1 0 1 0 tlpp should be integer number e g tlpp 0 2 or 0 5 etc smode smode is the search mode selection for processing for a programer internal use 0 Wide 1 Mid 2 Narrow default 2 pp_nosync turns of the synchronization mode of PP parameter period dfault is that PP synchronize to second tic lag delsize is the delay lag window size delsize can be 16 32 64 128 256 512 Default is DELA YSIZE in fx_cor c 0 also means default size pmode pmode is the plot mode 0 XTERM env PGDISP can change PGPLOT display device and PostScript file p
18. gplot ps out dfault 1 PostScript file pgplot ps out only 2 XTERM only 1 No graphic output comment any comment is the comment will appear in the correlation plot when pmode 0 1 2 loop loop is the loop parameter for real time VLBI processing in the future 0 no loop default 1 Infinite loop for real time use nopcal turns off the function of the phase calibration signal detection chl chlY defines Y channel for X ch 1 default 1 0 for delete ch2 ch2Y defines Y channel for X ch 2 default 2 0 for delete ch3 ch3Y defines Y channel for X ch 3 default 3 0 for delete ch4 ch4Y defines Y channel for X ch 4 default 4 0 for delete orule naming_rule is the naming rule O naming rule 0 1 naming rule 1 2 naming rule 2 3 naming rule 3 default is 1 odir outdir sets outfile directory name default is cout modefr modefr sets fringe stopping approx mode 0 no approx exact calc 9 9 level approx default 2 2 level approx 3 3 level approx frstep frstep sets fringe phase calc step in samples 0 automatic calc mode 1 every 1 sample 8 every 8 sample N every N sample Note N can be any number but 1000 N must be integer default is 8 frauto sets frstep 0 automatic calc mode frmid sets fringe stopping at band middle default is at base band rfoffset rf_offset sets RF frequency offset between Y and X RFy RFx Hz deflt is 0 Usage style 2 fx_cor afile sekibun soffset coffset
19. ir baseid coffset roffset frqgr nobs1 nobs2 xdir ydir utl_c wobbx wobby naming_type subnet ch skey xcoff where skdfile Schedule file name either VEX or SKED skdfile means monitor only apedir Apriori file out directory default env KSAPRIOUT if this is not defined default corrapri is applied if following parameters are set apri_calc will run with non interactive mode baseid Baseline ID A2 or A4 coffset Clock offset sec roffset Clock rate offset s s frqgr Frequency group correspond to PC 1 4 nobs l _ Start obs nobs2 Stop obs nobs1 0 nobs2 0 for all observations xdir X data file directory ydir Y data file directory utl_c UT1 UTC sec wobbx Wobb X arcsec wobby Wobb X arcsec naming_type K5 obs file naming rule 1 sidDDDNNNN dat SKED default 2 sdDDDHHMMSSG dat 1 sidDDDNNNN ch dat 2 sidDDDHHMMSSG ch dat 3 expid_sidG_scanid_Y Y Y YDDDDHHMMSS k5 e VLBI compliance 4 reserved for future 5 expid_scan stcode k5a d VEX default subnet Subnet mode control 0 no subnet 1 subnet on dflt ch Frequency ch for 1ch mode deflt 1 skey set satellite key s for NOZOMI mode if keys are more than one use like NOZ HYB dfault is auto mode xcoff X clock offset to UTC sec apri_calcenv for getting environment variable info File name of the output apeDDDNNNNXYG txt ape fixed head characters DDD day of th
20. led on your PC plesae use install_cor_usefftw sh instead of install_cor sh 1 6 Environment variables User defined environment variables are accepted in the following modules apri apri_calc corr fx_cor corr fx_cor_all sdelay sdelay mark5 m5tok5Rnp The modules themselves define some environment variables By typing as follows lt lt lt module name gt gt gt env The defined variables and current values are displayed example typing fx_cor env The following messages are displayed Environment variables K5SCOUT default directory for correlation data out null program deflt is cout KSAPRIDIR default directory for apriori file null program deflt is corrapri PGDISP default PGPLOT display device when selected so null program deflt is XTERM 2 Contents and items essential for the software correlation CORHOME home directory of the software correlator package CORHOME ipvlbi apri apri_calc program for calculating a priori delays CORHOME ipvlbi corr fx_cor program for fringe search CORHOME ipvlbi corr fx_cor_all program for full data correlation CORHOME ipvlbi sdelay sdelay program for delay rate estimation and display CORHOME ipvlbi mark5 mStok5 program for data transformation from Mark 5 to K5 3 Structure of the working space HOME sked schedule directory apri l apri_calc corrapri apri_calc output file directory apeD
21. mp CH03 sign 3 amp CH03 sign 4 amp CH03 sign 1 amp CH04 sign 2 amp CH04 sign 3 amp CH04 sign 4 amp CH04 sign 1 amp CHOS sign 2 amp CHOS sign 3 amp CHOS sign 4 amp CHOS RF Hz S 2238990000 0 U 2238990000 0 U 2238990000 0 U 2238990000 0 U 2240990000 0 U 2240990000 0 U 2240990000 0 U 2240990000 0 U 2260990000 0 U 2260990000 0 U 2260990000 0 U 2260990000 0 U 2284990000 0 U 2284990000 0 U 2284990000 0 U 2284990000 0 U 8400990000 0 U 8400990000 0 U 8400990000 0 U 8400990000 0 U VBW Hz 8000000 0 8000000 0 8000000 0 8000000 0 8000000 0 8000000 0 8000000 0 8000000 0 8000000 0 8000000 0 8000000 0 8000000 0 8000000 0 8000000 0 8000000 0 8000000 0 8000000 0 8000000 0 8000000 0 8000000 0 21 A 111 sign 1 amp CH06 8410990000 0U 8000000 0 22 A 113 sign2 amp CHO06 8410990000 0U 8000000 0 23 A 115 sign3 amp CHO06 8410990000 0U 8000000 0 24 A 117 sign4 amp CH06 8410990000 0U 8000000 0 25 A 119 sign 1 amp CHO7 8440990000 0U 8000000 0 26 A 121 sign2 amp CHO7 8440990000 0U 8000000 0 27 A 123 sign3 amp CHO7 8440990000 0U 8000000 0 28 A 125 sign4 amp CHO7 8440990000 0U 8000000 0 29 A 127 sign 1 amp CHO8 8490990000 0U 8000000 0 30 A 129 sign2 amp CHO08 8490990000 0U 8000000 0 31 A 131 sign3 amp CHO8 8490990000 0U 8000000 0 32 A 133 sign4 amp CHO08 8490990000 0U 8000000 0 Non parity mode is first assumed in data format analysis Mark 5 Data File home cvnhd data radio SH507901 1
22. nout 2 or more v vex_file VEX file name to be read when information file creation mode is set sid stat_id station ID when information file creation mode is set scan scan scan for MODE get when information file creation mode is set default 1 subp subpass set subpass at information file creation mode default is A odd 32bit 4byte shift in reading Mark5 data this works only for 64 track mode monit info_file monitor ON Naming rule for K5 file created MKS original mark5 name 4ch mode MKS kSa for group 1 in info_file usually ch01 04 MKS k5b for group 2 in info_file usually ch05 08 MKS kSc for group 3 in info_file usually ch09 12 MKS kSd for group 4 in info_file usually ch13 16 Ich mode MKS k5 NN where NN is channel number 01 16 Enviroment variables MSDIR default path to Mark5 data null M5VEX default path to Mark5 vex file null Usage style2 m5tok5 m5file k5file bit bit2 bit3 bitN options2 where m5file Mark 5 data file name to read k5file K 5 file name to be created bit Ist pick up bit position O max track bit2 2nd pick up bit position 0 max track bitN Nth pick up bit position O max track note N should be K5 channels AD bits Mark5 Fanout example 4ch 1 bit 2 options2 any order track ntrack of Mark5 track 8 16 32 64 deflt 32 fsampl fmhz channel sampling frequency MHz
23. nput again Select Station by ID gt root localhost mark5 m5tok5 home cvnhd data radio SH507901 1000000 dat i make M5tok5 running under Information File create mode info file m5tok5info txt will be created updated Enter VEX file name gt t5320 skd VEX file name t5320 skd SITES Station ID defined are SITES Station ID defined are ID SITE NAME Sh SHANGHAI Ur URUMQI Km KUNMIN Select Station by ID gt Sh search_site No CLOCK info for SHANGHAI included in the VEX FILE search_site So all 0 for clock information was set Detailed site information site definition SHANGHAI site name SHANGHAI site ID Sh site position 2831686 920000 4675733 68 1000 3275327 682000 site clock validity epoch 00000 clock epoch 00000 clock offset 0 000000e 00 clock rate 0 000000e 00 mode is lunar Mode was taken from Scan 1 as lunar Scan for mode get is 1 TRACK and FREQUENCY information for SHANGHAI BARREL ROLL off FREQDEF DualFreq8x8MHz 02 TRACKDEF MKIV 8Ch1bit1to4 adbit 1 sample_rate 16000000 000000 bb Pass HS Tr 1 A 1 2 2 A 1 4 3 A 1 6 4 A 1 8 5 A 110 6 A 112 7 A 114 8 A 116 9 A 118 10 A 120 11 A 122 12 A 124 13 A 126 14 A 128 15 A 130 16 A 132 17 A 1 3 18 A 1 5 19 A 1 7 20 A 1 9 AD fo chan sign 1 amp CH01 sign 2 amp CH01 sign 3 amp CH01 sign 4 amp CH01 sign 1 amp CH02 sign 2 amp CH02 sign 3 amp CH02 sign 4 amp CH02 sign 1 amp CH03 sign 2 a
24. ty bits b Making a table of correspondence between track numbers and BBCs gt m5tok5 MKS i make c Run format converter gt m5tok5 MKS d outdir d Repeat b and c also a if necessary for individual stations This has to be done separately for stations that have different track setups otherwise run it only once 5 3 Contents of correlation output The detail of the correlation output is listed in the different document which is available in the following web page http www 2 nict go jp ka radioastro IPVLBI fx_cor_output pdf 6 Data correlation The data correlation procedure is a sequence of preparation of an a priori parameter file apri_calc fringe clock parameter search fx_cor OR cor full baseline based correlation fx_cor_all OR cor_all and coarse search residual delay and rate estimation sdelay 6 1 Preparation of an a priori parameter file work directory HOME apri previously HOME ipvlbi apri used module apri_calc The program apri_calc is valid fora SKED DRUDGE and VEX files Usage style 1 apri_calc skdfile options where skdfile Schedule file name either VEX or SKED if is accompanied with skdfile like skdfile it means monitor only the contents of schedule file and options any order apedir apriori_file_out_directory is the directory for apriori file out default is the environment variable KSAPRIOUT If this environment variable is not defined then _ corr
25. x 7 automatic check both parity and non parity modes KKK K K K K K K K K K K K K K K KK K K K K K K K K K K KK K K K K K K K K K K K K K K K K K K K K K K K K K 2 K K Non parity mode is assumed first in data format analysis Mark 5 Data File home cvnhd data radio SH507901 1000000 dat Now analizing the data Checking 8 track mode not this mode Checking 16 track mode not this mode Checking 32 track mode OK this mode TIME FIELD CRC BIT HEADER AUX SYNC YDDDHHMM SSsss 12 DATA l1 DATA 2 FMHz 00 11223344 05400064 FFFFFFFF 50790110 00000763 6EA96EF4 9B48F8B2 4 0 01 11223344 07800064 FFFFFFFF 50790110 00000810 6CE49AB5 110B1406 4 0 02 11223344 09C00064 FFFFFFFF 50790110 00000C39 68A71431 9A251685 4 0 03 11223344 11010064 FFFFFFFF 50790110 00000B77 726AD717 131920AD 4 0 04 11223344 13410064 FFFFFFFF 50790110 00000E18 186071F6 171285AC 4 0 05 11223344 15810064 FFFFFFFF 50790110 000001A9 F9A169B8 FOCAA9FA 4 0 06 11223344 17C10064 FFFFFFFF 50790110 000004C6 EBDD899D DB582CFF 4 0 07 11223344 19020064 FFFFFFFF 50790110 00000D8C OADEAD69 2AECF474 4 0 08 11223344 21420064 FFFFFFFF 50790110 00000C1E 402A8120 BE688CA1 4 0 09 11223344 23820064 FFFFFFFF 50790110 0000036D E6EB4082 EA404513 4 0 10 11223344 25C20064 FFFFFFFF 50790110 000006CO OCE710D1 841B57A3 4 0 11 11223344 27030064 FFFFFFFF 50790110 00000363 7E46C406 935C3CFO 4 0 12 11223344 29430064 FFFFFFFF 50790110 0000074A FEFDE227 7E999573 4 0 13 11223344 31830064 FFFFFF
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